4 ms·
From what I remember, it can be power intensive which required more power to the motherboard to supply additional power to HBM. HBM2 will consume more than 100w
by Isthatablackgsd 5y ago
From what I remember, it can be power intensive which required more power to the motherboard to supply additional power to HBM. HBM2 will consume more than 100w due to increased I/O. It made sense why they are using it in GPU since it can handle additional power from it with 4/6/8 PIN Connectors from PSU directly.
If it is being used as a RAM on the motherboard, I imagine they would need to redesign the motherboard layout to accommodate the power and bandwidth for RAM slot to support HBM. Or a possibly HBM stick get it own pin connectors for PSU to avoid motherboard redesign.
- shadilay 5y agoIIRC HBM is actually more power efficient but the problem is power density since HBM is stacked. Could also be trace length. >Therefore, HBM provides at least an order of magnitude higher bandwidth than DDRx DRAM [15] at a lower power consumption (nearly 7pJ/bit as opposed to 25pJ/bit for a DDRx DRAM) with a smaller form factor [65]. https://people.inf.ethz.ch/omutlu/pub/HBM-undervolting_date21.pdf https://people.inf.ethz.ch/omutlu/pub/HBM-undervolting_date2...
- Isthatablackgsd 5y agoI figured they are making improvement in HBM but wasn't expecting an massive improvement with power saving. That is great to know. I forgot that HBM is stacked. I wonder if it a form factor issue? HBM is clearly "thick boy" than conventional DRAM. I imagine they need to make some room for the HBM modules including double-sided stick.
- shadilay 5y agoHBM stack is no thicker than any other silicon. You can see this with HBM GPU's.